FluentFilter.cs

FluentFilter.cs

using System;
using System.Collections.Generic;
using System.Linq;

namespace Fluent
{
    public static class Program
    {
        public static void Main()
        {
            var item = new Item(20);

            item.AddFilter(x =>
            {
                Console.WriteLine("Item is between 0, 10");
                return x.Value >= 0 && x.Value <= 10;
            });

            item.AddFilter(x =>
            {
                Console.WriteLine("Item is between 11, 20");
                return x.Value >= 11 && x.Value <= 20;
            });

            item.AddFilter(x =>
            {
                Console.WriteLine("Item is between 21, 30");
                return x.Value >= 21 && x.Value <= 30;
            });

            item.AddFilter(x =>
            {
                Console.WriteLine("Item is between 31, 40");
                return x.Value >= 31 && x.Value <= 40;
            });

            item.Compile();
        }
    }

    public class Item
    {
        private readonly List<Func<Item, bool>> _delegates = new List<Func<Item, bool>>();

        public int Value { get; }

        public Item()
        {
            Value = new Random().Next(0, 100);
        }

        public Item(int value)
        {
            Value = value;
        }

        public Item AddFilter(Func<Item, bool> filter)
        {
            _delegates.Add(filter);
            return this;
        }

        public void Compile()
        {
            var valid = _delegates.First(x => x(this));
            Console.Clear();
            valid.Invoke(this);
        }
    }
}